Recalls should work as long as the index MA is up and running .
Please also note the below.
* If the customer is v1 index [ i.e V10/upgraded and converted to v2 index ] , in this case where primary MA is index MA, we will have problem to recall from secondary copy if primary MA is down .
* If v2, as long as we switch index MA to online MA, recall should work
Please let ue know if you need any clarifications / or any questions.